5266891890841 has 9 divisors (see below), whose sum is σ = 6126811295391. Its totient is φ = 4514464993752.

The previous prime is 5266891890839. The next prime is 5266891890889. The reversal of 5266891890841 is 1480981986625.

The square root of 5266891890841 is 2294971.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 39285222025 + 5227606668816 = 198205^2 + 2286396^2 .

It is not a de Polignac number, because 5266891890841 - 2¹ = 5266891890839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5266891894841) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15900871 + ... + 16228723.

It is an arithmetic number, because the mean of its divisors is an integer number (680756810599).

Almost surely, 2^{5266891890841} is an apocalyptic number.

5266891890841 is the 2294971-st square number.

5266891890841 is the 1147486-th centered octagonal number.

It is an amenable number.

5266891890841 is a deficient number, since it is larger than the sum of its proper divisors (859919404550).

5266891890841 is an frugal number, since it uses more digits than its factorization.

5266891890841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655720 (or 327860 counting only the distinct ones).

The product of its (nonzero) digits is 59719680, while the sum is 67.

The spelling of 5266891890841 in words is "five trillion, two hundred sixty-six billion, eight hundred ninety-one million, eight hundred ninety thousand, eight hundred forty-one".